black & white tv screen from a lappy

Hello again guys
Yesterday a fellow of mine called to tell me he has a Myria laptop (intel dual centrino 1,6 ghz, 512 ddr, nvidia 7400 mobile) which works great but gives him a black & white image whenever he connects it to the TV;
He installed the video drivers properly and used a compatible tv-out cable but still, he wants some colours on his TV screen;
That's just about everything he told me and, since he doesn't have an internet connection at home, I am doing the research for him.
Thanks in advance.